Gbain-cleahek



F. P. ROOT.

Threishing Machine.

N. PETERS Pholql-flbognmun Wahinghm. o. c,

Pafented NoQ. 15, 1843..

' UNITED F. P. ROO'1,.OF SWEDEN, NEW YORK.

GRAIN-CLEANER...

Specification of Letters Patent No. 3,341, dated November 15, 1843.

To all whom it may concern:

Be it known that I, F. P. R001, of Sweden, in the county of Monroe andState of New York, have invented a new and useful Improvement inMachines for Separating Grain from Straw and Ohaff and other Impurities,called Roots Grain- Separator, which is described as follows, referencebeing had to the annexed drawings of the same, making part of thisspecification.

Figure 1 is a side elevation of the ma chine. Fig. 2 is a verticallongitudinal section of ditto. Fig. 3 is a horizontal section throughthe lower portion of the fan case showing the wheel W.

Similar letters refer to corresponding parts.

This machine consists of an inclined oblong box or trough A open at thetop and upper end, in which are arranged two pair of flanged wheels B,one at the upper and the other at the lower end of saidbox. The pair atthe upper end is secured to a horizontal transverse shaft C, turning inboxes fixed to the sides of said inclined box A. The lower pair turns onpins, projecting from the sides of the box A. Over these wheels arepassed two endless chains. To these chains are secured a series of barsD, extending at right angles across, from one chain to the other. Theseconstitute the conveyor D. On the sides of the box A are placed four ormore polygonal wheels E, for the purpose of shaking the chain of barsduring its movement around the wheels B. On the shaft O, and outside thebox, is secured a pulley F over which is passed a band G extending to asimilar pulley H on the fan shaft I. Under the lower end of the box A isarranged a frame K, of suitable size, form, and material, to contain theparts to be described, inwhich is suspended by cords or rods ahorizontal oblong sieve L on which the grain is deposited, after havingbeen separated from't-he straw, by the endless chain of bars. This sievereceives a vibratory movement by means of the ordinary right angledlever M and connecting rods N. Under this sieve or screen is placed aninclined board 0 which extends from below the sieve, and near the frontend thereof, in an inclined direction toward the opposite end. Atransverse board P is sus pended on pivots above the upper end of theinclined board O. This board P, is inclined at an angle of about 70degrees in order to direct the blast of air from the fan, upward, nearthe end of the sieve, to prevent it from blowing the grain over theedge.

An ordinary fan Q and case are arranged in front of the sieve, the blastof which is directed immediately under the sieve and grain, by means ofthe inclined boards 0, P. A small opening B being left between the trunkof the fan case, and the inclined board to allow the grain to discharge.

On the shaft O to which the flanch wheels are secured, is fastened agrooved pulley T over which is passed a band S extending to anotherpulley on a vertical shaft U near the opposite end of the box or troughA. To this vertical shaft U, is secured a horizontal wheel W, from theperiphery of which four or more wire pins project. These pins arearranged at equal distances apart on a line tangential to the peripheryof the wheel in order that they may have a tendency to throw, bycentrifugal force, the straw that may collect at that part, through theopening V in the side of the box.

The operation of this machine is as follows: The power being applied tothe pulley to the shaft of the fan, either directly from the horse poweror threshing machine. The straw and grain after being acted on by thethreshing machine is placed on the endless chain of bars (near the lowerflanch wheels) which carries it upward toward the upper end of the boxA. The polygonal wheels being irregular on their peripheries shake thechain and separate the grain from the straw. The graln falling on thebottom of the box is carried towardthe lower part of the same anddischarged on the vibrating sieve, where it is met with a blast of airfrom he fan which separates the chafi and other light impurities fromthe same. The

meshes of the sieve being large enough to allow the grain to passthrough, it descends to the inclined board, and is discharged throughtheopening R. The grain is prevented from being blown over the front endof the screen, (as is the case in the use of the ordinary fan andscreen,) by introducing the blast underneath the grain, and theapplication of the inclined board P. The straw passing through theendless chain of bars, is prevented from collecting, by means of thepins in the periphery of the hori- Venting the endless chain of barsfrom chokzontal Wheel W Which force it out through ing With stray asdescribed in combination an opening V in the side of the inclined box.With the conveyer D as described.

WVhat I claim as my invention and which F. P. ROOT. 5 I desire to secureby Letters Patent is Witnesses:

The use of the horizontal Wheel W with EDMUND MAKER,

pins projecting from its periphery for pre- JOHN H. J OI-INSON

